Life away from Earth has not yet been proved or disproved.
Life from Earth could have made the journey as far as the moons of Jupiter and Saturn, perhaps our life has left our Solar System to colonise other star systems. It's also of course possible that life evolved away from Earth and travelled through space to reach here. We just don't know yet. 
Pages in category "Life away from Earth"
The following 25 pages are in this category, out of 25 total.